Adds imageWriterPrivate support for Windows

chrome/browser/extensions/api/image_writer_private/operation_unittest.cc

Index: chrome/browser/extensions/api/image_writer_private/operation_unittest.cc
diff --git a/chrome/browser/extensions/api/image_writer_private/operation_unittest.cc b/chrome/browser/extensions/api/image_writer_private/operation_unittest.cc
index d835836318cb2d46eed716fdf8d57a2cebaeb259..dfae3f1bd0c798b6d08c5660a93ad604dd6a8ea0 100644
--- a/chrome/browser/extensions/api/image_writer_private/operation_unittest.cc
+++ b/chrome/browser/extensions/api/image_writer_private/operation_unittest.cc
@@ -89,10 +89,11 @@ class ImageWriterOperationTest : public ImageWriterUnitTestBase {
 
 } // namespace
 
-#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+#if defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_WIN)
 // Tests a successful unzip.
 TEST_F(ImageWriterOperationTest, Unzip) {
-  MockOperationManager manager;
+  base::RunLoop loop;
+  QuittingMockManager manager(loop.QuitClosure());
 
   scoped_refptr<OperationForTest> operation(
       new OperationForTest(manager.AsWeakPtr(),
@@ -128,9 +129,9 @@ TEST_F(ImageWriterOperationTest, Unzip) {
                                               operation,
                                               base::Passed(&zip_file)));
 
-  base::RunLoop().RunUntilIdle();
+  loop.Run();
 
-  EXPECT_TRUE(base::ContentsEqual(image_file_, test_device_path_));
+  EXPECT_TRUE(ImageWrittenToDevice(image_file_, test_device_path_));
 }
 #endif